Carburetor



Feb. 8, 1949. P. E. CUMMINGS, sR

CARBURETOR Filed Feb. 19, 1946 I N VEN TOR.

5 m a .0. M M r .mw P M Patented Feb. 8, 1949 UNITED STATES: PATENTornca Ed at-Honolulu; Territory of Ha Appiieaiian Feliruary 19,mruseiama 6422735 A third object of the" inventio'rr'is to provide asystem for feeding fuel to an internal" comb'ustion' engine whichincludesa variable-speed pump for mixing pre-heated airand"liquidgasoline and then conducting" saidpre' h'e'ated mix ture'to thecarburetor. I

A fourth object of the invention is the pro: vision of a tank for liquidgasoline" or? other" similar fuel in which the fuel maybe vaporizedtoiorma dry'vapor orgas. I

A fifth object of the invention is the" provisionof' a: fuel feedingsystem of the character derscribed which is provided with suitablesafeguards against the danger of explosiondue" to" backfire and alsoagainst the danger of excess fuelpressure. p r

These and otherobjects'are attainedby mechanism illustrated in the'accom anying-drawing V in which-'- Fig. 1 is a artly sectionalpartlydiagram matic" view, of the entire fuel feedingsystem hereindescribed andiol'aimed; and

Fig: 2 is an enlarged sectional view of" the carburetor thereof". V v

'The'internal'eombustion" engine I is of" (ion ventiona'ldesi'gn asis"the"exliaust'pipe lileading 40 fromv it; the generator. i2!controlledffiyit; and theignition system.including the: battery I3; Thegasoline tank M, however; .is notzconverfi tion'al equipment. Instead,it. has two "fiblhijarii mfits, a smaller compartment" l5 ihd a lai'icompartment. adjacent thereto l6'. Both" com partments may be filled"with f ordinarygasoline or" with such other fuel'as the internalcoinbustion engine l'fl f may be desi'fiedfitql the fuel b'ihg"introduced" into omiiaith'leiit l5 thio'iih mm- H and i'ntocomparrmeii-tis throuig inlet I8. Ariapeftured baflf biar'd I9 isoarrie'dwithin-thelarger compartment l6 hori zrmtanythereof, above; the gasolinethereincontained? This-baflie board prevents splashing of'- the gasoline into 1the" upperpart of tank compart-merit lfi an'd real 131 in effect,separates Sal C1 compartment" into an upper and at" lower colnpartmentcommunicating with" each other through the p rforations mthebafileboardi A ire second; lia'fii'e board 21' is" carried Within thesmaller'coinparthi'ent 15 also horizontally there of, Bufiunlike thefirst bafile' board mentioned this baifie board 25 is carrie'd" belowthe surfacelevel ofthegasoline 22 eohtainedini said c'om partment'. Thissecond bafile board'function'sft'o" prevent; excessive splashing of the"gasoline in compartment" I5; I

Mounted on th-e'exiiaustpipe l-lis anrair filter-- 313" whichcommunicates with larger compartme t r 11 a .i the'fiovv'df' airfronitfie filter; aflfthrough' the pipe" 3r arid-j into compartment IS.The pump" 32 the: manner riereiha-fter des'crilj'ed. It will be cbntidlld a'ibbfitfdl Iever' 35. connected t6 the mmmewmiorssi the throttleisadvahced or retardedriie -speeaiof the motor is caused'ltbin'reafsor'd'ebrea's; thereby providing. a 1 greater artiaar Hitdualifthe-pipe s r; An-out'letipipefl 31'" prov'i-ae'sm lfiiihiatio'nbetween thesgasolihe' compartment: I '6 arm the manifold a'sjormternaizcambustionengme :0; Thus it is thatwhn. theengma is iir'o'pratiofi, thethrottlg'heingi ad;

vahcediorlretarded;two-forces act simultaneously as walesindpehdentlifito draw air. int'dtfie V filter an, thence through pipe31, 'the compart nir'itlathe pipe. 31 and into the: manifold 38'}; the:vacuumereatdi by the e'r'igiiie. itself "and theressure or the pump 32.

' The system thus far describedioperates as} Thflpre-rieax cerium-amen Zlaunder tHedhfluenCe 0 is operatedfbymea'ri's'fdf avariahle'speedelectric? motors? which is c'or'i n'ectedtothe battery 1| 3i tends downto the bottom of the compartment l6 thereby causing the air passingtherethrough to mix very intimately with the gasoline in saidcompartment. In consequence of such action, a mixture of gasoline andpro-heated air, the mixture taking the form of a dry vapor or gas, isforced up through the outlet pipe 31 and thence into the manifold 38 ofthe internal combustion engine.

The second part of the system herein claimed makes use of the smallergasoline compartment and it includes an outlet pipe 40 which providescommunication between said compartment l5 and the carburetor 4|, thecarburetor communicating also with the pipe 31 which leads to themanifold 38. The vacuum generated by the internal combustion engineduring the operation of the engine sucks raw gasoline 22 unmixed with asfollows: From ground on the motor through the motor, along the wireleading therefrom which extends as a separate wire through the cable i1to the starting button, across the button to one side of the battery,through the battery then to the battery ground. From ground on fan motor33, through the motor 33, wire 45, across terminals 50 and 5|, wire 46,through the cable Al as a separate wire, out of cable 41 along wires 410:, 41b, 47c, and did to the battery, through the battery to ground. Intraversing wires 41a, b, and c, the current passes through controldevices which are well known and so little part of the invention thatthey have not even beennumbered. The safety valve 52 communieating withchamber I 5 of the gasoline tank aifords additional protection againstaccidents.

, This valve prevents excessive pressures from air up through the pipe40, into and through the I carburetor ll and thence through the pipe 31and into the manifold 38. When the raw gasoline 22 reaches the pipe 37,it is caused to mixwith the It will be noted that between the carburetor4| 1 and the pipe 3'! is a butterfly valve 32 which is controlled by thesame control member '36 which controls the rheostat control lever 35, sothat the speed of the pump 32 always corresponds to the size of theopenin provided by the butterfly valve 42, the larger the openin thegreater the speed, the smaller the opening the less speed.

To prevent damage from backfiring, a hingedly mounted valve 43 iscarried within pipe 31, said valve being normally closed and adapted toopen only when the current of gasoline vapor-air mixtin'e is moving inthe direction of the internal combustion engine in response to theforces acting upon it as above described. A switch 44 shown.diagrammatically in Fig. 1 controls the electric motor 33 which issuitably grounded and operates pump 32. This operation is effectedthough conductor 45 leading from the motor to the switch M and conductor38 leading to the main cable d1 of the ignition system. This cable isconnected by Wires Ma, 4711 and 470 and back to the battery i3 through awire did and is in parallel with the starter button. A pipe 48 extendsfrom the engine manifold 38 into the closed casing containing the switch44, and its end is closed and the pipe extends to the bottom of thecasing. A lightweight piston 49 is snugly. disposed within the chamberor casing around the j 48 and by means of the hole 49a will cause thepiston' iil to move up around the pipe 68 and make contact betweencontacts 56 and 5| thus closing the circuit for the motor. When,however, a backfire occurs the sudden surge of pressure in the manifoldwill be impressed upon pipe 48 and The pipe 43 above the conmake itselffelt in the casing through the hole ignition switch. The severalcircuits are traced building up in chamber I 6.

The invention hereinabove described is susceptibl of many variations andthese variations are herein contemplated.

I claim:

1. A fuel feeding system for internal combusr tion engines having acarburetor with an air intake port and a gasoline intake port, saidsystem comprising an air heating means consisting of an filter mountedon the exhaust pipe of the en gine, a gasoline tank divided by means ofa partition into two compartments, a pipe providing communicationbetween said air filter and one of said tank compartments, consisting ofan electric motor-driven air blower connected to said pipe to forceheated air from said air filter into said gasoline tank compartment, arheostat connected to said electric motor, a rod connecting saidrheostat to the throttle on the carburetor, whereby opening of thethrottle causes an increase in the speed of the electric motor and ofthe fan connected thereto, said air pipe leading from said air filterextending to the bottom of the gasoline tank compartment to force thheated air to bubble through the gasoline in said compartment tosaturate said air with gasoline, a perforated baffle board mounted nearthe top of said gasoline tank compartment horizontally thereof, saidbaffie board providing a space at the top of said gasoline tankcompartment between said baiiie board and the top wall of said tank inwhich the gasoline saturated heated air may collect, a second pipecommunicating between the upper portion of said gasoline tankcompartment and the air intake port and the carburetor, whereby thegasoline saturated heated air is adapted to be drawn 1 up into thecarburetor, a'second compartment in said gasoline tank, and a pipeconnecting said second compartment with the gasolineintake port in thecarburetor, whereby raw gasoline may be drawn up into the carburetor.

.2. A fuel feeding system for internal combus tion engines having acarburetor with an air intake port and a gasoline intake port, saidsystem comprising an air preheating means consisting of an air filterconnected to the exhaust pipe of the engine, a gasoline tank having aninlet at a,

point located a predetermined distance from the top of the tank, wherebythe tank may be filled only to a predetermined level, a pipe connectingsaid air filter with the bottom of said tank, a

variable speed'air blower connected tosaid pipe, whereby the preheatedair may be caused to 'bubble through the gasoline in said tank, therebybecoming saturated with gasoline, a perforated baiile board mounted insaid gasoline tank horizontally thereof above the level of the gasoline.

and defining a. space between said baffle board and REFERENCES CITED thetop wall or the tank wherein the gasoline saturated preheated air isadapted to collect, a The-fon-owmg retferences are of lecord m the fileOI this patent.

pipe providing communication between the air inlet port of thecarburetor and said space at the 5 UNITED STATES PATENTS top of thegasoline tank, whereby gasoline sat- Number Name Date urated air may bedrawn into the carburetor, and 1,072,402 Peregrine Sept 2, 1913 a secondgasoline tank communicating through 1,133,628 Cook May 11, 1915 anotherpipe with the gasoline intake port of the 1,191,438 watts July 18, 1916carburetor, whereby raw gasoline may be drawn 10 1,456,025 Lee May 22,1923 into the carburetor 1,816,737 Moss July 28, 1931 2,089,364Hadjidakis Aug. 10, 1937 PARKER ED CUMMINGS, SK 2,187,737 Gregory Jan.23, 1940 2,306,277 Oswald Dec. 22, 1942 2,358,840 Walker Sept. 26, 1944

